<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
</head>
<body>
    <script>
        const obj = {
            tag:'div',
            children:[
                {
                    tag:'span',
                    children:'hello world'
                }
            ]
        }
        
    </script>
</body>
</html>